This is a Livewire 3 Synthesizer (https://livewire.laravel.com/docs/synthesizers) for classes using spatie/laravel-data package (https://spatie.be/docs/laravel-data/v3/introduction)!

SpatieLaravelDataSynthesizer.php

<?php

namespace App\Support\Synthesizers;

use Spatie\LaravelData\Data;
use Livewire\Mechanisms\HandleComponents\Synthesizers\Synth;

class SpatieLaravelDataSynthesizer extends Synth
{
    public static string $key = 'spld';

    public static function match(mixed $target): bool
    {
        return $target instanceof Data;
    }

    public function dehydrate(Data $target): array
    {
        return [
            $target->toArray(),
            ['class' => get_class($target)],
        ];
    }

    public function hydrate(?array $value, array $meta): ?Data
    {
        if (is_null($value)) {
            return null;
        }

        $class = $meta['class'];

        if ( ! is_subclass_of($class, Data::class)) {
            return null;
        }

        return $class::from($value);
    }

    public function set(Data $target, string $key, mixed $value): void
    {
        $target->{$key} = $value;
    }

    public function unset(Data $target, string $key): void
    {
        unset($target->{$key});
    }
}